Battery pack and vehicle containing battery pack

1. A battery pack, comprising:

a pack case forming an appearance of the battery pack;

a battery module assembly provided in the pack case and having at least one battery module; and

a service plug configured to electrically connect the battery module assembly or cut off the electric connection of the battery module assembly, the service plug having a plug bus bar directly connected to the battery module assembly, the service plug including:

a plug body mounted to the pack case, the plug bus bar being provided at a lower portion of the plug body; and

a plug cover detachably mounted to the plug body,

wherein the plug body has a bus bar opening provided above the plug bus bar to expose the plug bus bar when the plug cover is separated,

wherein the plug bus bar is coupled to the battery module assembly by means of at least one coupling member, and

wherein the at least one coupling member passes through the bus bar opening when the plug bus bar and the battery module assembly are coupled.

2. The battery pack according to claim 1 ,

wherein the plug body is mounted to the pack case so that an upper portion thereof is disposed out of the pack case and a lower portion thereof is disposed inside the pack case, and

wherein the plug cover is detachably mounted to the upper portion of the plug body, the plug cover electrically connects the battery module assembly when being coupled to the plug body and cuts the electric connection of the battery module assembly when being separated from the plug body, and

wherein the plug bus bar is exposed out of the pack case when the plug cover is separated.

3. The battery pack according to claim 1 ,

wherein the battery module assembly includes a module board for electrically connecting the at least one battery module, and

wherein the plug bus bar is mounted directly to the module board.

4. The battery pack according to claim 3 ,

wherein the module board includes a bus bar mounting part on which the plug bus bar is placed, and the bus bar mounting part has at least one protruding member provided through the plug bus bar so as to be coupled to the at least one coupling member.

5. The battery pack according to claim 4 ,

wherein the plug bus bar includes:

a first bus bar provided at one lower side of the plug body and mounted to the bus bar mounting part; and

a second bus bar spaced from the first bus bar by a predetermined distance and mounted to the bus bar mounting part.

6. The battery pack according to claim 5 ,

wherein the bus bar mounting part includes:

a first mounting part on which the first bus bar is placed, the first mounting part having a first protruding member provided through the first bus bar; and

a second mounting part on which the second bus bar is placed, the second mounting having a second protruding member provided through the second bus bar.

7. The battery pack according to claim 6 ,

wherein the coupling member is provided in a pair, and

wherein the pair of coupling members include:

a first coupling member coupled to the first protruding member; and

a second coupling member coupled to the second protruding member.

8. The battery pack according to claim 7 ,

wherein the bus bar opening includes:

a first open hole provided above the first bus bar and allowing the first coupling member to pass therethrough; and

a second open hole provided above the second bus bar and allowing the second coupling member to pass therethrough.

9. The battery pack according to claim 6 ,

wherein the first bus bar has a through hole through which the first protruding member passes, and

wherein the second bus bar has a through hole through which the second protruding member passes.

10. The battery pack according to claim 5 ,

wherein the plug body includes a bus bar support provided between the first bus bar and the second bus bar to support the first bus bar and the second bus bar.

11. The battery pack according to claim 1 ,

wherein the plug body includes at least one pair of connector slots disposed to face each other with the bus bar opening being interposed therebetween and electrically connected to the plug bus bar.

12. The battery pack according to claim 11 ,

wherein the plug cover includes at least one pair of connector terminals inserted into the at least one pair of connector slots when the plug cover is coupled to the plug body and detached from the at least one pair of connector slots when the plug cover is separated from the plug body.

13. The battery pack according to claim 1 ,

wherein the plug body includes a high-voltage connector spaced from the bus bar opening and electrically connected to the plug bus bar.

14. The battery pack according to claim 13 ,

wherein the plug cover includes a high-voltage terminal inserted into the high-voltage connector when the plug cover is coupled to the plug body.

15. The battery pack according to claim 14 ,

wherein the service plug includes a plug lever pivotally mounted to the plug cover to separate the high-voltage terminal from the high-voltage connector by the pivotal movement.

16. The battery pack according to claim 1 ,

wherein the plug body includes a resistor connector spaced from the bus bar opening to measure insulation resistance of the battery module assembly when the plug body is separated from the plug cover.

17. The battery pack according to claim 3

wherein the battery module assembly includes a BMS board provided in the pack case to manage the at least one battery module and the module board, and

wherein the plug body includes a BMS connector electrically connected to the BMS board and disposed inside the pack case.

18. A vehicle, comprising the battery pack defined in claim 1 .